Circular /
Illinois State Geological Survey.
Urbana, Ill. : The Survey,
1938-
Title from cover.
Chemical abstracts
Coal abstracts
Biological abstracts
Selected water resources abstracts
Issued by the Survey under the following variant names: No. 23-202, Division of the State Geological Survey; no. 203-325, Division of the Illinois State Geological Survey; no. 326-    , Illinois State Geological Survey.
Mines and mineral resources
Information circular (Illinois State Geological Survey)